David Dudley Field II

David Dudley Field II, an American lawyer and legal reformer, reshaped how civil cases are handled in the United States. His most notable achievement was replacing traditional common law pleading with a simplified system known as code pleading, which became law in New York State in 1850. He also had a brief stint as a U.S. representative for New York’s 7th congressional district in 1877.

Born on February 13, 1805, in Haddam, Connecticut, Field was the eldest of ten children of Reverend David Dudley Field I, a Congregational minister and local historian, and Submit Dickenson Field. Among his brothers were Stephen Johnson Field, a future U.S. Supreme Court justice; Cyrus Field, the businessman behind the Atlantic Cable; and Reverend Henry Martyn Field, a noted clergyman and travel writer. He was also the uncle of Supreme Court Justice David Josiah Brewer. Field graduated from Williams College in 1825, studied law under Harmanus Bleecker in Albany, and then moved to New York City. Admitted to the bar in 1828, he quickly rose in the profession, joining the law office of Henry and Robert Sedgwick and becoming a partner after Robert’s death. In 1829, he married Jane Lucinda Hopkins, with whom he had three children: Dudley, Jeanie Lucinda, and Isabella. After Jane died in 1836, Field remarried twice, first to Harriet Davidson (who died in 1864) and then to Mary E. Carr (who died in 1874). His eldest son, Dudley, followed him into law and became a partner in his firm in 1854. His daughter Jeanie Lucinda married Anthony Musgrave, a British colonial official from Antigua, and became known for charitable work in the colonies.

After years of practice, Field grew convinced that American common law, especially in New York, needed major changes to make its procedures simpler and more unified. The year 1836 was devastating for him: his first wife, youngest child, and a brother all died. To deal with his grief, he set aside his legal work, traveled to Europe for over a year, and studied the courts, procedures, and legal codes of England, France, and other countries. Upon returning, he established his own law firm, joined by his brothers Stephen and Jonathan, and began pushing for a codified system of common law procedure. Much of his thinking was shaped by the 1825 Louisiana Code of Procedure, drafted by Edward Livingston, Louis Lislet, and Pierre Derbigny, which itself drew from French, Spanish, and Roman law, as well as common law and Livingston’s earlier Louisiana Practice Act. Field’s personal papers show he read Livingston’s 1825 report on the Louisiana Civil Code. He was also influenced by criticism of common law from his law partner Henry Sedgwick and lawyer William Sampson.

Field spent over four decades advocating for codification, becoming what one scholar called “the most persuasive and articulate advocate of codification in nineteenth-century America.” He started by outlining his ideas in pamphlets, journal articles, and legislative testimony, but initially met little interest. In 1846, his pamphlet “The Reorganization of the Judiciary” gained wider attention and helped push the New York State Constitutional Convention to support codification. In 1847, he got his chance to put ideas into official form when he was appointed head of a state commission to revise court procedure. The first part of the commission’s work, a section of the code of civil procedure, was reported and enacted in 1848. By January 1, 1850, the full Code of Civil Procedure—soon called the Field Code, as it was almost entirely his work—became law in New York. This new system eliminated the old distinction between actions at law (for monetary damages) and suits in equity (for non-monetary relief). Instead, a plaintiff needed to file just one civil action, what we now call a lawsuit. Eventually, with some modifications, the Field Code was adopted in 27 states and influenced later procedural reforms in England and its colonies, such as the Judicature Acts.

Beyond the code itself, Field’s work marked a conceptual shift. According to legal scholar Amalia Kessler, the key innovation was not just the “code” but the idea of “civil procedure” as a unified field. Before Field, common law jurisdictions did not treat “procedure” as a single body of law. For instance, Joseph Story’s earlier treatises kept “pleading” and “practice” separate and never used the word “procedure.” The Field Code merged these two areas under the heading of “procedure,” effectively inventing it as a distinct category defined against substantive law. In Field’s new system, allowing testimony from self-interested or otherwise flawed witnesses was...